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https://issues.apache.org/jira/browse/FLINK-20361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17239036#comment-17239036
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Jark Wu commented on FLINK-20361:
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The result is as expected. You can see the sliding window definition here:
https://ci.apache.org/projects/flink/flink-docs-master/dev/stream/operators/windows.html#sliding-windows
Do you mean the result of SQL is different than Table API?
> Using sliding window with duration of hours in Table API returns wrong time
> ---------------------------------------------------------------------------
>
> Key: FLINK-20361
> URL: https://issues.apache.org/jira/browse/FLINK-20361
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API
> Affects Versions: 1.11.0, 1.11.1, 1.11.2
> Environment: Java 11, test executed in IntelliJ IDE on mac OS.
> Reporter: Aleksandra Cz
> Priority: Blocker
> Fix For: 1.11.2
>
>
> If in [Table walkthrough|
> [https://github.com/apache/flink-playgrounds/blob/master/table-walkthrough/src/main/java/org/apache/flink/playgrounds/spendreport/SpendReport.java]]
>
> implemented *report* method would be as follows:
>
> {code:java}
> public static Table report(Table transactions) {
> return transactions
>
> .window(Slide.over(lit(1).hours()).every(lit(5).minute()).on($("transaction_time")).as("log_ts"))
> .groupBy($("log_ts"),$("account_id"))
> .select(
> $("log_ts").start().as("log_ts_start"),
> $("log_ts").end().as("log_ts_end"),
> $("account_id"),
> $("amount").sum().as("amount"));
> {code}
>
> Then the resulting sliding window start and sliding window end would be in
> year 1969/1970. Please see first 3 elements of resulting table:
> {code:java}
> [1969-12-31T23:05,1970-01-01T00:05,3,432,
> 1969-12-31T23:10,1970-01-01T00:10,3,432,
> 1969-12-31T23:15,1970-01-01T00:15,3,432]{code}
> This behaviour repeats if using SQL instead of Table API,
> it does not repeat for window duration of minutes, nor in Tumbling window.
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